A sign marks the entrance to Cleveland Hopkins Airport on October 15, 2014 in Cleveland, Ohio. Recently diagnosed Ebola patient, health care worker Amber Vinson, traveled on Frontier Airlines from Dallas to Cleveland with a low fever on October 10, and returned to Dallas on October 13. (Michael Francis McElroy/Getty Images)

Officials in Cleveland are tracking down those who may have come into contact with Amber Joy Vinson, the second Dallas nurse to be diagnosed with Ebola.

Vinson flew on a Frontier Airlines flight from Cleveland to Dallas on Monday while she was running a 99.5 degree fever. Vinson had told CDC officials that she had a fever, but they cleared her for flying.

Three schools have been closed. A school in Akron was closed becasue a parent had direct contact with Vinson. The school her child attends has been closed.

Two other schools are closed in Summit County, Ohio, because a teacher may have been on a plane that Vinson previously flew on. Another school was disinfected last night but it is open for school.

One person in Ohio has self-quarantined after having been in contact with Vinson, who was visiting Cleveland for three days.